بسم الله الرحمن الرحيمHay guys....someone is hunting around...!!!My friend another_one... we're not equal yet "as you said" I don't really think you mean it...The word advice can not be the same term for both singular and plural... check the Second College Edition of "THE AMERICAN HERITAGE DICTIONARY" I'ts the most international trusted dictionary and you will find that there must be "S" at the end of the word to indicate the plural, If you don't have that dictionary you can visit this site www.awl-elt.com/dictionaries and discover the truth...
Anyway, thanks for your remarkable contribution..It made me search through two dictionaries..